The term functions as a noun phrase. In this construction, "911" serves as an adjectival noun or modifier, specifying the context of the head noun, "dago." The word "dago" itself is a noun, specifically a highly derogatory and offensive ethnic slur historically used against people of Italian, Spanish, or Portuguese descent.
Linguistically, the phrase combines a numerical designator for an emergency service with a pejorative term. Its meaning is not standardized and depends entirely on its original context, which is likely informal, such as a direct quote, a line from a piece of media, or a user-generated search query. The phrase suggests a reference to a specific person or event involving an emergency call and an individual targeted by the slur. Its interpretation is therefore constructed from its components rather than from an established definition.
In any practical application or analysis, the primary consideration must be the severely offensive nature of the core noun. While the grammatical function is that of a noun phrase identifying a specific concept or individual, its use is rooted in discriminatory language. Any discussion of the term should prioritize acknowledging its harmful and derogatory character over its literal or structural meaning.
